system_core/logd/LogStatistics.cpp, branch replicant-6.0

logd: optimize code hotspots

2015-11-01T12:29:12+00:00

Discovered that we had a few libc hotspots. Adjust code to generally
reduce or nullify the number of calls to malloc, free, strlen,
strcmp, strncmp, memcmp & strncasecmp. Total gain looks to be about
3% of logd's processing time. malloc still contributes to 3%, but all
others are now total 0.5%.

Bug: 23685592
Change-Id: Ife721121667969260cdb8b055524ae90f5911278

logd: switch to unordered_map from BasicHashtable

2015-06-04T18:03:37+00:00

(charry pick from commit 511338dd575572d567c04d69eaea60627b6c3452)

BasicHashtable is relatively untested, move over to
a C++ template library that has more bake time.

Bug: 20419786
Bug: 21590652
Bug: 20500228
Change-Id: I926aaecdc8345eca75c08fdd561b0473504c5d95

logd: Add TID statistics

2015-05-13T16:23:01+00:00

(cherry pick from commit 17ed6797df722464eb5cc6dfc3e1e32aec284b70)

Bug: 19608965
Change-Id: Ifbf0b00c48ef12b5970b9f9f217bd1dd8f587f2c

logd: Cleanup

2015-05-13T16:22:56+00:00

(cherry pick from commit 7718778793b106498b931dd708a466cf3a6f6a0f)

- Android Coding Standard for Constructors
- Side effects NONE

Change-Id: I2cda9dd73f3ac3ab58f394015cb810820093d47b

logd: Add klogd

2015-05-13T16:22:45+00:00

(cherry pick from commit ae4d928d816e30dbe57c2c321b0f0759d0567b3f)

- Add a klogd to collect the kernel logs and place them into a
  new kernel log buffer
- Parse priority, tag and message from the kernel log messages.
- Turn off pruning for worst UID for the kernel log buffer
- Sniff for 'PM: suspend exit', 'PM: suspend enter' and
  'Suspended for' messages and correct the internal definition
  time correction against monotonic dynamically.
- Discern if we have monotonic or real time (delineation 1980) in
  audit messages.
- perform appropriate math to correct the timestamp to be real time
- filter out any external sources of kernel logging

Change-Id: I8d4c7c5ac19f1f3218079ee3a05a50e2ca55f60d

logd: Add Tag statistics

2015-05-12T22:34:56+00:00

(cherry pick from commit 344bff4391dd434dda501e812f18f524290c5a7c)

- Optional class of statistics for events Tags
- export tagToName from LogBuffer (located in main.cp to address
  https://android-review.googlesource.com/#/c/110204)
- Can not handle dropped because getTag() can not work,
  will need to be fixed if we start filtering.

Bug: 19608965
Change-Id: I7b90607ca588bf37bab71f19b1570a290e772776

logd: uidToName add dex2oat UID

2015-05-12T16:55:02+00:00

(cherry pick from commit 023f51f360472f6bb9bad495e55cdb32b5411bc5)

- When searching for uidToName from /data/system/packages.list
  one must search for the uid % AID_USER;
- If uid % AID_USER is greater than AID_SHARED_GID_START - AID_APP,
  then subract it and try again to pick up uidToName.

Change-Id: I24df42957ff7e746fffa5d39484637b1b726b9c0

logd: class hierarcy for Uid and Pid statistics.

2015-05-07T17:01:39+00:00

(Cherry pick from commit 81b3eabc49736b89c4f99940f79785074955eaa5)

Add EntryBase and EntryBaseDropped base classes for statistical
entries to inherit from. Abstract add(), subtract() and drop()
methods to common LogBufferElement in each for entry policy decisions.
Some move of details out of LogStatistics.cpp and place them into
LogStatistics.h. Add statistical add(), subtract() and
drop() methods to hash table to call entries for policy.

Bug: 19608965
Change-Id: Ib8a33a8fe28871ef165d1632c6546a5c606231e8

logd: improve details on chatty records

2015-04-30T22:25:12+00:00

(Cherry pick from commit 21fb7e0b753b2251369bfaa1c6f6a09e58e64437)

- Report applications UID, TID/PID by name.
- change wording to have an accurate connotation
- drop privilege check since filtered upstream

Bug: 19608965
Bug: 20334069
Bug: 20370119
Change-Id: I2b1c26580b4c2de293874214ff5ae745546f3cca

logd: Statistics headers

2015-04-21T17:54:34+00:00

Answer to the question "Bytes or Lines?"

Change-Id: I352737265aeac63ea8d89e778d4222a9123bdf07